Novel marine engine room heat recovery water generator

Abstract

The utility model discloses a novel marine engine room heat recovery water maker, which is characterized in that two partition plates are connected in a water maker body, an airflow channel is arranged between the two partition plates and the water maker body, and the two partition plates are connected with a U-shaped pipe through pipelines; a compressor of the refrigerating system is connected with a condenser, the condenser is connected with two evaporators, and the two evaporators are connected with the compressor. The seawater desalination system comprises a seawater inlet pipe and a seawater outlet pipe, the inner end of the seawater inlet pipe is arranged above the condenser, and four filters of a front PP cotton filter element, an activated carbon filter element, a reverse osmosis membrane and a rear activated carbon filter element are connected through water collecting pipelines and are all connected with a U-shaped pipe. According to the utility model, the steam compression refrigeration system is used for providing cooling capacity for refrigeration circulation. Seawater desalination and refrigeration are achieved through heat release of the condenser and heat absorption of the evaporator, full utilization of seawater is achieved, resource waste is avoided, energy consumption of the system can be greatly reduced, meanwhile, the energy utilization rate is increased, and the effects of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] This utility model relates to a novel ship engine room heat recovery water generator, belonging to the field of seawater desalination technology. Background Technology

[0002] During ocean voyages, freshwater supply plays a crucial role in ensuring the normal operation of ships. Carrying large reserves of freshwater inevitably reduces cargo space, lowers carrying capacity, and increases energy consumption. Therefore, obtaining freshwater on demand through seawater desalination is an important way to meet the freshwater needs of ships. Currently, the technologies used in ship seawater desalination systems mainly focus on distillation and reverse osmosis. However, both technologies have significant limitations in practical applications.

[0003] Distillation technology in seawater desalination requires a large amount of energy to achieve water evaporation and condensation, resulting in high desalination costs. This high energy consumption is particularly disadvantageous in the context of long-distance ocean voyages where energy resources are limited and acquisition costs are high.

[0004] While reverse osmosis technology performs well in desalination, effectively removing salt and impurities from seawater, it faces numerous challenges in practical ocean-going applications. The diverse range of impurities in marine environments can easily damage the equipment during the reverse osmosis process, significantly shortening its lifespan. Furthermore, the high purchase cost of reverse osmosis equipment, coupled with the additional costs of frequent replacements, makes this technology prohibitively expensive for shipboard desalination applications, hindering its widespread and cost-effective adoption in large-scale ship operations.

[0005] The engine room of a ship contains running engines. Because marine diesel engines, gas engines, generators, and other equipment have high output power and correspondingly high heat dissipation, the engine room temperature is generally about 10°C higher than the outside ambient temperature. This high temperature in the engine room affects the comfort of the operators and even the safe operation of the machinery. Furthermore, the heat lost by the engine ultimately comes from the fuel, inevitably resulting in energy waste. Therefore, measures can be taken to recover heat from the engine room and lower the temperature. Simultaneously, while the ship is at sea, seawater can be easily accessed. By recovering waste heat from the engine room, desalinated water can be produced and treated for drinking water for the crew or as hot water for domestic use.

[0006] Existing shipboard water makers are generally integrated with the ship's waste heat recovery system, which not only increases the complexity of system design and installation and occupies engine room or hull space, but also affects system operation. For example, when using engine flue gas waste heat for heating, it can affect engine exhaust back pressure, thus impacting unit operating efficiency. A malfunction in the water maker may even require a complete shutdown, affecting the ship's operational reliability. A separately designed water maker for use on a ship must be carefully considered in light of the specific circumstances of the vessel's application, avoiding excessive size or space occupation that could affect cargo carrying or reduce cabin space. Water desalinated from seawater has high hardness and cannot be directly consumed, requiring the transport of drinking water on board, increasing the ship's load. Therefore, it is necessary to design a modular water maker that is easy to install, replace, and use immediately. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a new type of ship engine room heat recovery water generator.

[0008] The technical solution provided by this utility model is as follows: A novel ship engine room heat recovery water purifier, comprising a water purifier body, characterized in that the water purifier body is provided with a refrigeration system and a seawater desalination system; the upper and lower parts of the water purifier body are respectively provided with a first partition and a second partition, one side of the first partition and the second partition are both connected to the water purifier body, and the other side has an airflow channel between them and the water purifier body; the lower ends of the first partition and the second partition are both connected to a U-shaped pipe through a pipeline;

[0009] The refrigeration system includes a compressor, which is connected to a condenser. The condenser is connected to a first evaporator and a second evaporator via pipes and a throttling valve. Both the first evaporator and the second evaporator are connected to the compressor via pipes and a one-way valve.

[0010] The seawater desalination system includes a seawater inlet pipe and a seawater outlet pipe with valves located on the lower middle and lower parts of both sides of the water purifier body, a first filter with a built-in PP cotton filter element, a second filter with a built-in activated carbon filter element, a third filter with a built-in reverse osmosis membrane, and a fourth filter with a built-in activated carbon filter element; the inner end of the seawater inlet pipe is located above the condenser, and the first, second, third, and fourth filters are connected through a water collection pipe and are all connected to a U-shaped pipe.

[0011] Furthermore, each of the first and second partitions has an upwardly inclined extension plate on its other side, and there is an airflow channel between the extension plate and the water purifier body.

[0012] Furthermore, the water purifier body is a quarter-cylinder shape.

[0013] The beneficial effects of this invention are as follows: This invention provides cooling capacity through a vapor compression refrigeration system, including one condenser and two evaporators, to perform a refrigeration cycle. Seawater desalination and cooling are achieved through the heat release of the condenser and the heat absorption of the evaporators. This not only fully utilizes seawater and avoids resource waste, but also significantly reduces system energy consumption and improves energy utilization efficiency, achieving energy conservation and emission reduction.

[0014] First, this invention achieves a compression refrigeration cycle through a compressor, condenser, first evaporator, second evaporator, throttling valve, and check valve. The heat released by the condenser vaporizes seawater into water vapor, and the heat absorbed by the evaporator condenses the water vapor into liquid water. Fresh water is then obtained through a filter, realizing the desalination of seawater to produce hot water. This not only reduces the cost of seawater desalination but also achieves full utilization of resources.

[0015] Secondly, this invention achieves a cooling effect by exchanging heat between the hot air in the cabin and the second evaporator, which then cools the air. A fan then delivers cold air to the outside, providing heat to the system. Furthermore, the heat released condenses the water vapor in the hot air into liquid water, thus filtering out fresh water. This not only recovers and utilizes the waste heat from the diesel engine, achieving cascaded energy utilization, but also provides cooling and hot water production.

[0016] Third, the water purifier of this utility model is designed in the shape of a quarter cylinder, with two internal partitions and an upwardly extending extension plate on one side. The partitions collect condensed water, while water vapor condenses into liquid water on the extension plate and flows down to collect the water. Both partitions have U-shaped tubes at their lower ends for easy drainage of condensed water, while also preventing short circuits caused by airflow mixing. This utility model is easy and quick to install and convenient to replace.

[0017] Fourth, the water purifier produces fresh water by absorbing heat from the engine room through an evaporator. Whether the ship's machinery is running or not, the evaporator can absorb heat from the engine room environment, ensuring a real-time supply of desalinated water.

[0018] Fifth, the desalinated water can be purified step by step through components such as the pre-filter PP cotton filter, activated carbon filter, reverse osmosis membrane (RO membrane), and post-filter activated carbon filter, resulting in purified water that deeply purifies the water, effectively removes bacteria and viruses, and improves water quality and taste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structural principle of this utility model.

[0021] In the diagram: 1. Compressor; 2. Condenser; 3. First evaporator; 4. First throttle valve; 5. Second evaporator; 6. First check valve; 7. Second check valve; 8. Second throttle valve; 9. Fan; 10. First valve; 11. Second valve; 12. First filter; 13. Second filter; 14. Third filter; 15. Fourth filter; 16. First baffle; 17. Second baffle; 18. Extension plate; 19. U-tube Detailed Implementation

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings:

[0023] like Figure 1 As shown, a novel ship engine room heat recovery water generator includes a water generator body, a refrigeration system, and a seawater desalination system.

[0024] The water purifier body is a quarter-cylindrical shape, making it easy to place in a corner of the ship's engine room. It comprises a three-layer structure, with each layer separated by partitions. A first partition 16 is located between the top and middle layers. One side of the first partition 16 is connected to the water purifier body, and the other side has an upwardly inclined extension plate 18. A second partition 17 is located between the middle and bottom layers. One side of the second partition 17 is connected to the water purifier body, and the other side has an upwardly inclined extension plate 18. An airflow channel exists between the extension plate 18 and the water purifier body, facilitating the inflow of water vapor from the bottom, heat exchange with the evaporator, and condensation into water. The lower ends of both the first partition 16 and the second partition 17 are connected to a U-shaped pipe 19 via pipelines, facilitating the discharge of condensed water and preventing short circuits caused by the interaction of internal and external airflow.

[0025] The refrigeration system includes a compressor 1, a condenser 2, a first evaporator 3, a first expansion valve 4, a second evaporator 5, a first check valve 6, a second check valve 7, and a second expansion valve 8. The outlet of the compressor 1 is connected to the inlet of the condenser 2. The outlet of the condenser 2 is connected via pipes to the inlets of the first expansion valve 4 and the second expansion valve 8, respectively. The outlet of the first expansion valve 4 is connected to the inlet of the first evaporator 3. The outlet of the first evaporator 3 is connected to the inlet of the second check valve 7. The outlet of the second expansion valve 8 is connected to the inlet of the second evaporator 5. The outlet of the second evaporator 5 is connected to the inlet of the first check valve 6. The outlets of the first check valve 6 and the second check valve 7 are connected via pipes to the inlet of the compressor 1, respectively.

[0026] The seawater desalination system includes a seawater inlet pipe equipped with a first valve 10, a seawater outlet pipe equipped with a second valve 11, a first filter 12, a second filter 13, a third filter 14, and a fourth filter 15. The seawater inlet pipe and the seawater outlet pipe are respectively located in the lower middle and lower parts of both sides of the water purifier body. The inner end of the seawater inlet pipe is positioned above the condenser 2. The first filter 12, the second filter 13, the third filter 14, and the fourth filter 15 are connected through a water collection pipe and are all connected to a U-shaped pipe 19. The first filter 12 is a filter with a built-in PP cotton filter element, the second filter 13 is a filter with a built-in activated carbon filter element, the third filter 14 is a filter with a built-in reverse osmosis membrane (RO membrane), and the fourth filter 15 is a filter with a built-in activated carbon filter element. Their functions are as follows: First, they pre-filter large particulate impurities in the water, such as sediment, rust, and suspended solids, protecting subsequent filter elements; second, they adsorb odors, residual chlorine, and organic pollutants in the water, further improving water quality and taste; third, based on pre-filtration, they utilize the principle of reverse osmosis, using pressure difference as the driving force to allow water molecules to pass through, trapping inorganic salts, heavy metal ions, organic matter, and other impurities. It can deeply purify water quality, removing over 95%-99% of dissolved solids and efficiently removing bacteria and viruses. It can also provide a high-quality water source for subsequent filters, reducing the burden on subsequent filters and improving water quality and taste; fourth, it performs fine filtration, removing odors generated during water storage and ensuring a fresh taste in the output water.

[0027] This invention enables the production of hot water from seawater desalination and the absorption of heat for refrigeration.

[0028] In compressor 1, the refrigerant is compressed into a high-temperature, high-pressure refrigerant gas. This gas then enters condenser 2 through pipelines, where it releases heat and condenses into a liquid refrigerant. The condensed liquid refrigerant then flows through pipelines to the first evaporator 3 and the second evaporator 5 via the first expansion valve 4 and the second expansion valve 8, respectively. In the first and second evaporators, it absorbs heat and rises in temperature before returning to compressor 1 via the first check valve 6 and the second check valve 7, thus completing the refrigeration cycle. The check valves prevent refrigerant backflow due to shutdown or pressure differences in different pipelines, and also ensure that the evaporators operate at different pressures, allowing for different temperature controls.

[0029] 1. Seawater desalination to produce hot water

[0030] At this time, the first valve 10 is opened, and seawater enters through the first valve 10. After absorbing the heat released by the condenser 2, the seawater heats up and vaporizes to form water vapor. The water vapor evaporates upward and exchanges heat with the first evaporator 3 to condense into liquid water, which flows into the second partition 17. It then enters the first filter 12, the second filter 13, the third filter 14, and the fourth filter 15 through the water collection pipe to be filtered and thus obtain desalinated water.

[0031] 2. Heat absorption and refrigeration

[0032] Hot air from inside the cabin enters through the air inlet, exchanges heat with the second evaporator 5, and releases heat to cool down. Water vapor condenses into liquid water, which flows into the first partition 16 and then through the water collection pipe into the first filter 12, the second filter 13, the third filter 14, and the fourth filter 15 for filtration to obtain potable desalinated water. The remaining air is cooled by the air outlet under the action of the fan 9.

[0033] It should be understood that any parts not described in detail in this specification belong to the prior art. The above embodiments are merely descriptions of preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and improvements to the technical solutions of this utility model made by those skilled in the art without departing from the spirit of this utility model should fall within the protection scope defined by the claims of this utility model.

Claims

1. A novel ship engine room heat recovery water generator, comprising a water generator body, characterized in that, The water purifier body is equipped with a refrigeration system and a seawater desalination system; the upper and lower parts of the water purifier body are respectively equipped with a first partition and a second partition. One side of the first partition and the second partition are connected to the water purifier body, and there is an airflow channel between the other side and the water purifier body. The lower ends of the first partition and the second partition are connected to a U-shaped pipe through pipelines. The refrigeration system includes a compressor, which is connected to a condenser. The condenser is connected to a first evaporator and a second evaporator via pipes and a throttling valve. Both the first evaporator and the second evaporator are connected to the compressor via pipes and a check valve. The seawater desalination system includes a seawater inlet pipe and a seawater outlet pipe with valves located on the lower middle and lower parts of both sides of the water purifier body, a first filter with a built-in PP cotton filter element, a second filter with a built-in activated carbon filter element, a third filter with a built-in reverse osmosis membrane, and a fourth filter with a built-in activated carbon filter element; the inner end of the seawater inlet pipe is located above the condenser, and the first, second, third, and fourth filters are connected through a water collection pipe and are all connected to a U-shaped pipe.

2. A novel ship engine room heat recovery water generator according to claim 1, characterized in that... The first and second partitions are each provided with an upwardly inclined extension plate on the other side, and there is an airflow channel between the extension plate and the water purifier body.

3. A novel ship engine room heat recovery water generator according to claim 1, characterized in that... The water purifier body is a quarter-cylinder shape.

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